SADP 6.0/6.4 #110 Valve Springs

We have found that some of the springs out on the market are not what they are advertised at for seat pressure. Our springs are 110# on the seat at 1.83 installed height. This is extremely important to have the correct springs for the cam and RPM your choosing to run with. Have you noticed how there has been Rocker Arm failures in these engines? Well no, it's only a Cam issue, it's also a spring concern as well with some of the aftermarket springs! Don't take a chance on other marketed springs stating that they are better than our springs! Factory is [email protected]